The National Energy Education Development (NEED) solar curriculum project includes Teachers Guides and Student Lab Books for hands-on solar activities as well as a variety of resources to learn about solar energy and its applications. To help schools incorporate more solar energy education into their elementary classrooms, NEED prepared a series of hands-on kits about solar. The Teacher and Student Guides may be accessed in PDFs below. Kits are available for purchase from the NEED Project.
There are lots of great resources online for teaching about solar energy. A few excellent examples: